Motorcycle oil cooler



FIG. 1 is a perspective view of a motorcycle oil cooler showing our new design, it being understood that the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is an enlarged front left side perspective view thereof; and

FIG. 3 is an enlarged rear right side perspective view thereof. 

The ornamental design for a motorcycle oil cooler, as shown and described. 